@supports not (display: flex) {
}

@supports ( box-shadow: 0 0 2px black inset ) or
          ( -moz-box-shadow: 0 0 2px black inset ) or
          ( -webkit-box-shadow: 0 0 2px black inset ) or
          ( -o-box-shadow: 0 0 2px black inset ) {}


@supports ((transition-property: color) or
           (animation-name: foo)) and
          (transform: rotate(10deg)) {}
